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関連する概念動画

The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

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Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
484
Types of Semiconductors01:20

Types of Semiconductors

1.2K
Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
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Semiconductors01:22

Semiconductors

1.3K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
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Zeroth Law of Thermodynamics01:14

Zeroth Law of Thermodynamics

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Experimentally, if object A is in equilibrium with object B, and object B is in equilibrium with object C, then object A is in equilibrium with object C. That statement of transitivity is called the "zeroth law of thermodynamics." For example, a cold metal block and a hot metal block are both placed on a metal plate at room temperature. Eventually, the cold block and the plate will be in thermal equilibrium. In addition, the hot block and the plate will be in thermal equilibrium.
6.7K
Quantum Numbers02:43

Quantum Numbers

48.5K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

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熱いシリコン量子ビットの普遍的な量子論理

L Petit1, H G J Eenink1, M Russ1

  • 1QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands.

Nature
|April 17, 2020
PubMed
まとめ
この要約は機械生成です。

研究者はシリコン量子ドットを使って 高温量子ロジックを実証しています この画期的な発見により 拡張可能な量子コンピューティングが可能になり 1ケルビン以上の量子ビットの制御と結合が可能になり 統合量子回路への道が開けました

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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関連する実験動画

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

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科学分野:

  • 量子コンピューティング
  • 半導体装置の物理
  • 量子情報科学

背景:

  • 拡張可能な量子コンピューティングは 制御可能で結合された量子ビットに依存しています
  • 固体量子コンピューティングのアプローチは,しばしば非常に低い温度 (100 mK以下) を必要とし,実用的なアプリケーションを制限します.
  • 以前の研究では シリコンベースの量子ビットが 高温で動作することを示しましたが 2量子ビットのロジックゲートが欠けていました

研究 の 目的:

  • シリコンの量子ドットを使って, ケルビン以上の温度で量子計算のための普遍的なゲートセットを実証する.
  • 現在の固体量子コンピューティングプラットフォームの 温度制限を克服するためです
  • 拡張可能な統合量子回路の開発を進める

主な方法:

  • シリコンの量子ドットを使って 量子ビットを実装した
  • 電子回転共振で単一の量子ビット制御を達成した.
  • パウリ・スピン・ブロックで 量子ビットの読み取りを
  • 2キビットゲートの 調整可能な交換相互作用を証明した.

主要な成果:

  • 1ケルビン以上の温度で 量子論理ゲートのユニバーサルセットを 実行しました
  • シングル・クビット・フィデリティは 99.3%まで
  • 2つの量子ビットと調整可能な交換相互作用 (0.518MHz) の一貫した制御を示した.

結論:

  • シリコン量子ドットは高温量子ロジックに適した熱強度を示します.
  • 半導体プラットフォームで"ホット"で普遍的な量子ロジックを実証した.
  • この研究は,実用的な量子情報処理のための統合量子回路へのスケーラブルな経路を提供します.